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net: mdio: mscc-miim: Handle the switch reset

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The mscc-miim device can be impacted by the switch reset, at least when
this device is part of the LAN966x PCI device.

Handle this newly added (optional) resets property.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herve Codina 2024-06-20 14:01:25 +02:00 committed by David S. Miller
parent e5efa3ff41
commit 9e6d33937b
1 changed files with 8 additions and 0 deletions
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8
drivers/net/mdio/mdio-mscc-miim.c
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@ -19,6 +19,7 @@
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#define MSCC_MIIM_REG_STATUS 0x0
#define MSCC_MIIM_STATUS_STAT_PENDING BIT(2)
@ -271,10 +272,17 @@ static int mscc_miim_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct regmap *mii_regmap, *phy_regmap;
struct device *dev = &pdev->dev;
struct reset_control *reset;
struct mscc_miim_dev *miim;
struct mii_bus *bus;
int ret;
reset = devm_reset_control_get_optional_shared(dev, "switch");
if (IS_ERR(reset))
return dev_err_probe(dev, PTR_ERR(reset), "Failed to get reset\n");
reset_control_reset(reset);
mii_regmap = ocelot_regmap_from_resource(pdev, 0,
&mscc_miim_regmap_config);
if (IS_ERR(mii_regmap))